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C Hoeffel

Publications and source records attributed to C Hoeffel.

At least 55 records · Page 3Linked to original sources
PubMed1996

Contrast material injection for hepatic helical computed tomography. Comparative study of five protocols.

RATIONALE AND OBJECTIVES: The authors develop and compare contrast material injection protocols suitable for hepatic helical computed tomography. METHODS: One hundred twenty-one patients who underwent contrast-enhanced computed tomography (CT) of the liver with spiral CT imaging were evaluated for enhancement of the liver parenchyma and for post-enhancement attenuation of the aorta and portal vein with iohexol. Patients were assigned randomly to five protocols with different flow rates, volume of contrast material, and scan delays. RESULTS: Mean parenchymal contrast enhancement was statistically significantly higher with protocol 5 (biphasic injection of 100 mL of iohexol 300 (g/100 mL) at a flow rate of 1.5 mL/second followed by 25 mL at 2 mL/second; total iodine load = 37.5 g, with a scan delay of 70 seconds). The highest aortic enhancement and the second highest portal vein enhancement were obtained with this protocol. CONCLUSION: The authors suggest an easily tolerated injection protocol able to ensure high parenchymal liver enhancement and satisfactory aortic and portal vein enhancement. This protocol includes a long scan delay (70 seconds), biphasic low flow injection rate, and a relatively low iodine load.

Adult↗
PubMed1996

Osteoid osteoma after a fracture of the distal radius.

We report a case of osteoid osteoma occurring at the site of a previous fracture of the radius treated by internal fixation with insertion of a rod. The fracture may have acted as a trigger for the formation of an osteoid osteoma.

Adult↗
PubMed1996

[How to assess the value of scientific publications?].

The Institute of Scientific Information has edited an index to evaluate the diffusion of scientific articles. It is based on the fact that the more an article is cited as a reference in other articles, the more it is considered to be important, and the higher the coefficient attributed to the journal in which it was originally published. Several methods of evaluation have been proposed, the two main ones being the impact and citation half-life. The impact factor takes into account the average number of times which a journal is mentioned for recent articles published in a given year. The citation half-life gives an insight into the longeivity of the articles of a journal by the number of citations received. This index is an attempt to quantify the notoriety of scientific journals for all scientific medical specialties. Each year, the institute for Scientific Information publishes a classification of the journals of each medical specialty.

Bibliometrics↗
PubMed1995

[Primary psoas abscess in children: 6 cases].

BACKGROUND: Primary psoas abscess is very rare in childhood; its diagnosis and treatment can be improved by the use of recent imaging techniques. PATIENTS: Six children, aged 11 months to 10 years (mean: 51 months) were admitted from January 1987 to 15 December 1993 because they suffered mainly from fever, lumbar pain and/or homolateral flexed hip. Examination showed a painful inguinal mass in five patients and hyperleucocytosis in all. X-rays showed disappearance of the external limit of psoas in two patients; ultrasonography showed enlarged psoas in all, associated with hypoechogenic mass in two and without echo in four patients. CT scan showed the abscess in all cases, permitting a needle aspiration for bacteriological studies: Staphycococcus aureus was present in five cases. Drainage of the abscess by CT-guided percutaneous catheter was performed in two patients. Surgical drainage was performed in three including one for whom percutaneous catheter drainage did not succeed. The two other patients were only given antibiotics. CONCLUSION: CT-guided needle aspiration to establish presence and nature of fluid collection is a well established technique that may be extended to treatment of psoas abscesses.

Child↗
PubMed1995

Spontaneous unilateral adrenal hemorrhage: computerized tomography and magnetic resonance imaging findings in 8 cases.

PURPOSE: We report and discuss the imaging features of 8 cases of spontaneous unilateral adrenal hematomas, a rare lesion. MATERIALS AND METHODS: Computerized tomography (CT) was done in 8 cases, magnetic resonance imaging (MRI) in 5, and CT and MRI in 5. Imaging findings were reviewed and correlated with histological findings in all 8 cases. RESULTS: MRI was the most accurate imaging modality and showed variable appearances. On pathological evaluation the hematomas were old and organized. No contrast enhancement was noted on CT or MRI. CONCLUSIONS: One must not consider the diagnosis of spontaneous adrenal hematoma only as superimposed on a phechromocytoma or malignant lesion in the case of an incidentally discovered large adrenal mass with normal biological findings. MRI signs of adrenal hemorrhage and the failure of enhancement of such a mass should strongly suggest adrenal hematoma.

Adrenal Gland Diseases↗
PubMed1994

[Spontaneous unilateral adrenal hematomas. 10 cases].

Spontaneous unilateral adrenal haematoma is a very rare condition. We report 10 such cases in which the pathological examination confirmed the diagnosis and for which computed tomography (CT) (n = 10) and magnetic resonance imaging (MRI) (n = 5) were performed. The diagnosis of this condition was difficult because there was no specific clinical setting nor any specific functional disorder. CT most often revealed a large mass (> 4 cm) of one of the adrenal glands, most often displaying soft-tissue attenuation and thus not specific. However, MRI suggested the diagnosis, showing foci of hypersignal on T1-weighted images and heterogeneous masses on T2-weighted images, predominantly displaying hypersignal and not enhancing, after Gd-DTPA dynamic perfusion study. Pathologic examination of the surgical specimen confirmed either idiopathic haematoma (n = 5) or haematoma possibly associated with a small benign tumour (n = 5). The diagnosis of adrenal haematoma must be considered when an unilateral isolated large adrenal mass is discovered in an asymptomatic patient. MRI with Gd-DTPA dynamic perfusion study has to be performed and one may suggest waiting and repeat imaging (so as to follow decrease in size or signal changes) in order to avoid surgery.

Adrenal Gland Diseases↗
PubMed1993

[Spontaneous unilateral adrenal gland hemorrhage and pregnancy].

Spontaneous unilateral haemorrhage of the adrenal gland during the third trimester of pregnancy is a rare event. The diagnosis may be suspected on the basis of echographic or MRI explorations. There is no sign of endocrine dysfunction. The pregnancy may be conducted to term when the diagnosis is probable but echographic monitoring shows the absence of further development. Only one analogous observation based on MRI diagnosis was found in the literature.

Adrenal Gland Diseases↗
PubMed1992

Button sequestrum of the tibia and pheochromocytoma.

A 16-year-old boy suffers from headaches. A bilateral adrenal pheochromocytoma is diagnosed and removed. After surgery, the image of bone sequestrum has disappeared. Osseous microthrombi secondary to hemoconcentration are responsible for the image of button sequestrum.

Adolescent↗
PubMedDate not supplied

Periesophageal mediastinal fibromatosis.

We report two cases of aggressive fibromatosis of the mediastinum with esophageal involvement in adults. CT showed the posterior mediastinal mass involving the esophagus. In both cases, surgical resection was not feasible. Histopathologic examination showed a fibrous tissue. The patients died two years later.

Adult↗
PubMedDate not supplied

Low-grade osteosarcoma of metacarpal bone.

A radiograph of the second left metacarpal bone in a 34-year-old man showed irregular lytic areas in the diaphysis that was expanded with perpendicular periosteal reactions. Examination of the first biopsy specimen indicated a fibrous dysplasia. Examination of the second biopsy specimen revealed an unequivocal grade I intramedullary osteosarcoma, desmoid to fibrous dysplasia-like in histological pattern. Three years after an adequate en bloc resection of the metacarpal bone, the man was healthy. The long-term course is usually favorable.

Adult↗
PubMedDate not supplied

Pyogenic spondylitis with Scheuermann's disease.

We present the case of a teenager suffering from dorsal and lumbar pain. Imaging modalities diagnosed a lumbar retro-marginal anterior herniation and thoracic spondylitis. Such association has been reported twice in the literature.

Adolescent↗
PubMedDate not supplied

Melanotic neuroectodermal tumor of infancy.

A 6-month-old female presented with a swelling of the left superior maxillary bone. A radiograph revealed a radiolucent lesion in the left anterior maxilla, and CT, showed a solid mass. At surgery, the lesion was a cystic dental tumor of ectopic location which was treated by excision. The pathological diagnosis was melanotic neurorectodermal tumor. This is an uncommon benign tumor of the neural crest origin that occurs mainly in the maxilla (70% of cases) but can occur in other areas such as the skull and the mandible. CT reveals a hyperdense mass and MR shows a hypointense mass on T1-weighted images and an iso-intense mass on T2-weighted images. The evolution is usually benign after surgical removal.

Diagnosis, Differential↗